tf.polygamma()

tf.polygamma(a, x, name=None)

Compute the polygamma function \(\psi^{(n)}(x)\).

The polygamma function is defined as:

\psi^{(n)}(x) = \frac{d^n}{dx^n} \psi(x)

where \(\psi(x)\) is the digamma function.

Args:

• a: A Tensor. Must be one of the following types: float32, float64.
• x: A Tensor. Must have the same type as a.
• name: A name for the operation (optional).

Returns:

A Tensor. Has the same type as a.